package thread;

import java.util.concurrent.Executor;
import java.util.concurrent.ExecutorService;
import java.util.concurrent.Executors;

public class ThreadPoolDemo {
    public static void main(String[] args) {
        ExecutorService threadPool = Executors.newFixedThreadPool(3);
        for (int i = 0; i < 5; i++) {
            Runnable r = () -> {
                try {
                    Thread t = Thread.currentThread();
                    System.out.println(t.getName() + "正在执行一个任务");
                    Thread.sleep(5000);
                    System.out.println(t.getName() + "执行完毕");
                } catch (InterruptedException e) {
                    e.printStackTrace();
                }

            };
            threadPool.execute(r);
            System.out.println("将一个任务交给了线程池");
        }
        threadPool.shutdownNow();
    }
}